Brake-beam structure



Dec. 16, 1930. H. w. EKHoLM BRAKE BEAM STRUCTURE Filed April 5. 192s 2 Sheets-Sheec 1 L '13 .ZN VEA/TOR /g #eve/7^ mam/m @www De@ 16, 1930- H. w. rr-:KHoLM BRAKE BEAM TRUcTURE Fle'd April 5, 1928 2 Sheets-Sheet 2 www fg mma H7 O NEY-S' Patented Dec. 16, 1930 UNITED STATES lPATENT OFFICE l HERBERT W. E xHoLivr, OE CIITCACO, ILLINOIS, yAssICNOR To CHICAGO RAILWAY EQUIPMENT COMPANY, or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS vBRAKE-BEAM STRUCTURE Application led April 5,

My invention relates generally to railway rolling stock and particularly to brake beam equipment, and consists in the provision of means for preventing relative movement between a sliding chair and the beam member to which it is applied.

It is a common experience that the ordinary third or fourth point support chair,.clamped to the bar or rod forming the tension member of the chairv beam, rotates on the rod or shifts longitudinally of the same. To eliminate this undesirable mo-vement, which obviously interferes with the proper functioning of the chair, car builders and railroads have spot welded the Chair to the truss rods. I

While this eliminates the difficulty referred to, it is not altogether desirable because it requires special equipment for securing the desired result and it results in a substantially permanent assembly with the beam making it diilcult or impossible to adjust the chair, or to reverse it, to compensate for wear.

The object of my invention is to eliminate the above mentioned difculties and I secure this object by providing a simple and eliicient positive interengaging means between the beamelement and the chair.

InV the accompanying drawings which illustrate my inventionsectioned in Figures 2 and 3.,

Figure 1 is largely a diagrammatic illustration of a brake beam showing fourth point support chairs mounted on the beam and sliding on the supports.

Figure 2 is a vertical transverse section through the tension member of a beam and a portion of a chair mounted thereon andincluding a preferred form of my invention. Figure 2 is taken approximately on the line 2 2 of Figure 3. l

Figure 3 is a vertical section taken on the line 3-3 of Figure 2. f 1 I Figure 4 is an end view and Figure 5 is a side view of the chair insert element which is Figures 6 and 7, 8 and 9, 10 and 11, 12 and 13, and 14 and 15, are similar end and side views illustrating various forms of inserts lwhich might be used in place of the insert illustrated in Figures land 5.

Figure 16 isa section corresponding to 1928. Serial No. 267,778.

Figure 3 and illustrating a modified arrangement ofthe chair and insert.

Figure 17 is a transverse section through the tension member of the beam and showing the application thereto of a modified form of chair in which the beam engaging element is formed integrally with the chair.`

Figure 18 is a side elevation of the structure shown in Figure 17.

Figures 19 to 35 illustra-te other modifications of my invention and will be referred to in detail'hereafter.

The brakebeam shown in Figure 1 comprises the usual compression member 1, tension member 2,and strut 3, the beam mounting the brakeV heads 4 and overlying the fourth pointsupports 5 which are carried by the truck springplank 6. The tension member2 of the beam may be of the usual round rod or of anyr other-shapeand is adapted to mount the sliding chairs 7. Each of these chairs is shown as consisting of a bearing portion 8 and a: clamp, vcomprising two jaws 9 Vand abolt 10 and -nut 11,-used to draw the jaws together to clamp them tightly onthe beam .tension member 2j The parts mentioned are well known inthe art and in themselves do not constitute my invention.VV

I vprovide thebodyof the chair with a recess lwhich is adapted' to receive an insert 12 preferably formed ofharder material than the tension member of the beam, and having a portion projecting beyond the face of the chair which engages the face of the beam member. Preferably, thesurface of this projecting portion of the insert 12 will have one or more sharpened points P. When the clamp elements are tightened, the projecting portion of the insert will be thrust intothe beam member to a greater or less extent so as to engage the beam member and positively prevent relative movement of the chair.

The insert may take any one of ay large variety of forms and I illustrate a few variawith a sharp thread 16 formed thereon.` Figures 10 and 11 illustrate an ordinary bar 17 of square cross section and either one of four edges 18 of the bar may be turned to engage the surface of the beam member.V Figures 12 and 13 illustrate a bar 19 with a chair is shown, the same having a central downwardly bearing portion 23 at eachside of which are thej aw elements 24 adapted to surround the beam member 25 and to be clamped thereon by the bolt 26 and nut 27. These jaw elements have formed integrally therewith the upward projections 29 which will be sharp enough to indent the surfaces of the beam member. Preferably the entire chair device in Figures 17 and 18 will be formed of spring material which will be harder than the material ofthe beam element In Figures 19, 20, and 21 I illustrate a modification of my invention which makes possible the use of the same with great many chairs already manufactured and installed. rIhe chair 28 has no recess for receiving a hardened insert, the insert 29 being placed between the jaws of the chair and beneath the bolt 30. As the nut on bolt 30 is tightened to draw the jawstogether, from the position shown in dot-and-dash lines, the `insert'29 will be forced into the beam element 62.

In Figures 22 and 23, I illustrate a beam engaging element 31 which. is pivotally mounted upon the bolt 32 which clamps the chair 33 to the beam 34. This insert 31 may be hammered edgewise into the beam engaging position shown and ythen held in such position by bending the vlip 35 into a slot formed inone of the jaws 33.

In Figure 24 I show a chair 36 having a slot adapted to receive a tapered key 37 which will have a sharpened edge 38 and Wm be third or fourth point support chair, an elethrust into the beam member 39 either by the clamping bolt 40 or by hammering the end of the insert.

` Figure 25 shows a similar structure in which the insert is a screw-threaded element 41 extending through an opening in the chair 42. `In Figure 26 I illustrate a small insert 43 seated in a pocket in the chair 44 and having a shank adapted to extend through the wall of the pocket and be riveted over as indicatedk at 45. `This will-maintain the assembly of the chair and insert before the chair 1s aphardened projection on face.` Y

plied to a beam, or when it is removed from a beam. Y

Figures 27 and 31v show an insert 46 which is not only retained by the clamping bolt 47 but has its beam engaging portion 48 enlarged so as to be forced against the beam member 49 when the bolt 47 is tightened.

In Figures 28, 29, 30 and 35, I show an insert 50 Vhavinglips 51 adapted to be bent around the'fupstanding ears 52 of the chair aws 53. The lower edge"54i'of element 50 is sharpened as indicated and this element will maintain itsassembly with the chair irrespective of the assembly with the beam or the presence v0f the clamping bolt.

t Figure 32 illustrates. an application of an insert which is merely a bar of triangular cross section similar to that shown in Figure 12, the same being driven into a corresponding recess formed in the wall of the chair 56.

In Figures 33 and 34 'I illustrate my invention as applied to a rectangular tension vbar 57 of a brake beam.' Thejjaws 58 and 59 of the lchair 60 will be clamped together by a suitable bolt passing through their upper ends.. The righthand jaw 59 is provided with a pocket 61 for receiving the insert 62 which will biteinto the bar 57 when the chair jaws are clamped against the bar. .Vhile there is no possibility of a chair of this type rotating on the bar, as frequently occurs with chairs applied to round bars, nevertheless it is possible for the ordinary chair to slide lengthwise of the bar and the use of my invention will prevent such undesirable relative movement of the chair and bar. n Y

Obviously many other modifications in the details of my invention and in its application to various brake beams may be made without departing Afrom :the spirit of my invention, and I contemplate Ythe exclusive use Aof such variations as come within' the scope of my claims.

I claim: y j v 1. In combination, a brake beam member having' a smooth surface, and a third or fourth point supportv chair adapted to be clamped to said member and having a sharp its beam-engaging 2; In combination, a brake beam member,

ment having a sharp projection, means for immovably positioning said element onsaid support chair, and means for forcing said projection into said member.

3. In a brake beam third or fourth point support chair,-a device for clamping the chair against a brake beam member, and a separate element seated in said chair and adapted to be forced into the surface of said member when said device is tightened. f

. 4. Ina brake beamjthird or fourth point support chair, a separate element adapted to be clamped between said chair and a brake all() beam member, there being a sharp hardened projection on the beam-engaging face of said element.

5. In a brake beam third or fourth point support chair, a jaw adapted to be clamped against a beam member, and an element of relatively hard material inserted in said jaw so as to be forced into the surface of a beam member when said jaw is clamped to said member. Y

6. In a brake beam third or fourth point support chair, a jaw adapted to be clamped against a beam member, and anelement of relatively hard material inserted in said jaw and having asharp projection adapted to be forced into the surface of a beam member when said jaw is clamped to said member.

7. In a brake beam third or fourth point support chair, a clamp device having a recess in its beam-engaging.surfaee, and a separately formed element of relatively hard material seated in said recess and having a short projection extending above said surface.

8. A third or fourth point support chair z for brake beams including a clamping portion adapted to encircle a brake beam part and provided with a hardened projection adapted to embed itself in said brake beam art.

p 9. In a brake beam third or fourth point support chair, beam clamping jaws, means for drawing said jaws together, and an element positioned in said chair and including a projecting portion adapted to be forced into said member when said means are tightened, thereby positively preventing movement of said chair on said member.

' l0. In a brake beam third or fourth point support chair, a body having a pocket, and an insert of hardened material inserted in said pocket and having a face projecting above the edge of said pocket and provided with a series of sharp corrugations adapted to bite into the surface of a brake beam member to which the chair is applied.

l1. Incombination, a brake beam member, a clamp about said member, a third or fourth point support chair carried by said clamp, and a separate tooth-like element positively held in engagement with said member `by said clamp to hold the same Vand said chair against relative movement. l2. In combination, a brake beam member, and a third or fourth point support chair including clamping jaws about said member,

and a separate tooth-like element between the contacting faces of said member and jaws for positively holding said member and chair against relative movement.

In testimony whereof I hereunto afiix my signature this 16th dav of March, 1928.

HERBERT W. EKHOLM. 

